Small Block Chevy Parts Testing - Total Recall: Danger Mouse Part 9

A Recap Of Danger Mouse Tests

Mike Petralia May 1, 2003 0 Comment(s)
Sucp_0305_05_z Chevy_small_block_part_9 Lunati_piston 1/7

The rotating assembly also had to be up to the task, so we chose a complete Lunati forged kit with a 3.48-inch stroke crank and 5.7-inch rods. The Lunati pistons have four-valve reliefs and have yielded between 8.9 and 9.4:1, depending on the cylinder heads used.

Tests 1-4: Baseline, new intake manifold, roller-tip rockers, retard cam 2-degrees (October 2002).

Test 1: This represents what a typical 355-cid small-block would make if it had just been blueprinted but still had most of its stock components.
Max 395 tq, 308 hp
Avg 376 tq, 266 hp

From this point on, except for the changes listed, nothing else was touched.

Test 2: We installed a Weiand PN 8004 dual-plane intake manifold and leaned out the Q-jet.
Max 394 tq, 325 hp
Avg 380 tq, 270 hp

Test 3: We replaced the stock stamped-steel rocker arms with COMP Cams 1.5:1 roller- tip Magnum rockers.Avg 390 tq, 278 hp

Test 4: We retarded the cam 2 degrees.
Max 405 tq, 349 hp
Avg 390 tq, 278 hp

Sucp_0305_06_z Chevy_small_block_part_9 Cam 2/7

Danger Mouse has seen four different cams so far, and it loved every one of them. Even though it keeps making more power and revving higher the bigger we go, we're still well within the realm of street-worthy cams with these tests.

Tests 5-8: Bigger 1 3/4-inch headers, full-roller rockers, bigger XE256H cam, stud girdle added (November 2002).

Test 5: Installed larger 1-3/4 Hooker headers. Compare Tests 4 and 5 and you'll see that average torque was down by 2 lb-ft, but peak toque and horsepower were up slightly, and average horsepower increased by 9. That's a fair trade to us.
Max 407 tq, 351 hp
Avg 388 tq, 287 hp

Test 6: Swapped in COMP Cams full-roller 1.5:1 aluminum rocker arms. Peak and average power didn't change at all (compare Tests 5 & 6), but we did get 5 more lb-ft of torque at 3,200 rpm.
Max 407 tq, 351 hp
Avg 389 tq, 288 hp

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